As of 2026, British citizens do not need a traditional visa for short-term visits to Paris (for tourism or business up to 90 days), but the travel requirements have become more formalized. Following the full implementation of the ETIAS (European Travel Information and Authorisation System) in late 2026, UK passport holders are required to apply for this digital authorization online before traveling to the Schengen Area. The ETIAS costs €7 for adults (free for those under 18 or over 70) and is valid for three years. It is a "visa waiver," not a visa, similar to the U.S. ESTA. Additionally, you must ensure your passport was issued less than 10 years before the date you enter and is valid for at least three months after the day you plan to leave. You are also subject to the 90/180-day rule, meaning you can stay in the Schengen Zone for a maximum of 90 days in any 180-day period. While the process remains relatively simple, forgetting to secure your ETIAS before heading to St. Pancras for the Eurostar will likely result in being denied boarding at the border control point.